Patents by Inventor Dag Willén
Dag Willén has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220359104Abstract: A superconducting power cable system, including: a superconducting power cable including a cryostat, a first cooling station, a second cooling station, wherein the superconducting power cable extends between the first cooling station and the second cooling station, wherein the first cooling station is configured to pump cooling fluid into the cryostat in a first direction towards the second cooling station and the second cooling station is configured to pump cooling fluid into the cryostat in a second direction, opposite to the first direction, towards the first cooling station, an access pipe assembly arranged between the first cooling station and the second cooling station, the access pipe assembly extending into the cryostat for tapping cooling fluid flowing from the first cooling station and the second cooling station from the cryostat, and a return pipe structure arranged externally to the superconducting power cable, the return pipe structure connecting the access pipe assembly to the first cooling statType: ApplicationFiled: April 22, 2022Publication date: November 10, 2022Inventors: Dag Willén, Carsten Thidemann
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Publication number: 20220301744Abstract: A superconducting power cable having: a former including: an axially stretchable core, and a plurality of elongated outer elements wound helically around the core, wherein the core includes a first material and the elongated outer elements include a second material thermally contracting less than the first material at the operating temperature of the superconducting power cable; and a superconducting conductor layer arranged around the former.Type: ApplicationFiled: March 11, 2022Publication date: September 22, 2022Inventors: Dag Willén, Carsten Thidemann, Martin Pitzer
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Patent number: 9331468Abstract: Cable end section comprises end-parts of N electrical phases/neutral, and a thermally-insulation envelope comprising cooling fluid. The end-parts each comprises a conductor and are arranged with phase 1 innermost, N outermost surrounded by the neutral, electrical insulation being between phases and N and neutral. The end-parts comprise contacting surfaces located sequentially along the longitudinal extension of the end-section. A termination unit has an insulating envelope connected to a cryostat, special parts at both ends comprising an adapter piece at the cable interface and a closing end-piece terminating the envelope in the end-section. The special parts houses an inlet and/or outlet for cooling fluid. The space between an inner wall of the envelope and a central opening of the cable is filled with cooling fluid. The special part at the end connecting to the cryostat houses an inlet or outlet, splitting cooling flow into cable annular flow and termination annular flow.Type: GrantFiled: November 26, 2013Date of Patent: May 3, 2016Assignee: NKT CABLES ULTERA A/SInventors: Chresten Traeholt, Dag Willen, Mark Roden, Jerry C. Tolbert, David Lindsay, Paul W. Fisher, Carsten Thidemann Nielsen
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Publication number: 20140135222Abstract: Cable end section comprises end-parts of N electrical phases/neutral, and a thermally-insulation envelope comprising cooling fluid. The end-parts each comprises a conductor and are arranged with phase 1 innermost, N outermost surrounded by the neutral, electrical insulation being between phases and N and neutral. The end-parts comprise contacting surfaces located sequentially along the longitudinal extension of the end-section. A termination unit has an insulating envelope connected to a cryostat, special parts at both ends comprising an adapter piece at the cable interface and a closing end-piece terminating the envelope in the end-section. The special parts houses an inlet and/or outlet for cooling fluid. The space between an inner wall of the envelope and a central opening of the cable is filled with cooling fluid. The special part at the end connecting to the cryostat houses an inlet or outlet, splitting cooling flow into cable annular flow and termination annular flow.Type: ApplicationFiled: November 26, 2013Publication date: May 15, 2014Applicant: NKT Cables Ultera A/SInventors: Chresten Traeholt, Dag Willen, Mark Roden, Jerry C. Tolbert, David Lindsay, Paul W. Fisher, Carsten Thidemann Nielsen
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Patent number: 8624109Abstract: This invention relates to a termination unit comprising an end-section of a cable. The end section of the cable defines a central longitudinal axis and comprising end-parts of N electrical phases, an end-part of a neutral conductor and a surrounding thermally insulation envelope adapted to comprising a cooling fluid.Type: GrantFiled: March 19, 2008Date of Patent: January 7, 2014Assignee: NKT Cables Ultera A/SInventors: Chresten Traeholt, Dag Willen, Mark Roden, Jerry C. Tolbert, David Lindsay, Paul W. Fisher, Carsten Thidemann Nielsen
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Patent number: 8623787Abstract: The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system.Type: GrantFiled: November 1, 2012Date of Patent: January 7, 2014Assignee: NKT Cables Ultera A/SInventors: Dag Willen, Chresten Traeholt, Manfred Daumling, Jerry C. Tolbert, Mark Roden, David Lindsay
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Publication number: 20130244881Abstract: The invention relates to a superconducting element joint comprising a joint between two superconducting elements comprising at least one direct SC-SC transition joint. By the invention an improved superconducting element joint may be obtained. The invention also relates to a process for providing such superconducting element joint and a superconducting cable system comprising such superconducting element joint.Type: ApplicationFiled: May 9, 2013Publication date: September 19, 2013Applicant: NKT Cables Ultera A/SInventors: Mark Roden, Jerry C. Tolbert, Carsten Thidemann Nielsen, Chresten Traeholt, Paul W. Fisher, David Lindsay, Dag Willen
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Patent number: 8442605Abstract: The invention relates to power cable comprising, at least one HTS-tape and a cooling system comprising a fluid cooling medium for cooling the at least one HTS-tape. The at least one HTS-tape being at least partly surrounded by a cooling layer comprising said fluid cooling medium and an electrical insulation at least partly impregnated with said fluid medium. The power cable of the invention has shown to reduce the risk of fault current and electrically breakdown. When extra cooling is needed for stable operation the cooling medium may evaporate in the cooling layer for providing the cooling.Type: GrantFiled: June 4, 2008Date of Patent: May 14, 2013Assignee: NKT Cables Ultera A/SInventors: Dag Willen, Chresten Traeholt, Carsten Thidemann Nielsen
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Patent number: 8326386Abstract: The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system.Type: GrantFiled: April 21, 2006Date of Patent: December 4, 2012Assignee: NKT Cables Ultera A/SInventors: Dag Willén, Chresten Traeholt, Manfred Däumling, Jerry C. Tolbert, Mark Roden, David Lindsay
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Publication number: 20100227764Abstract: The invention relates to a superconductive multi-phase, fluid-cooled cable system comprising a) a cable comprising at least three electrical conductors constituting at least two electrical phases and a zero- or neutral conductor, said electrical conductors being mutually electrically insulated from each other, and b) a thermal insulation defining a central longitudinal axis and having an inner surface and surrounding the cable, said inner surface of said thermal insulation forming the radial limitation of a cooling chamber for holding a cooling fluid for cooling said electrical conductors. The invention further relates to a method of manufacturing a cable system and to its use. The object of the present invention is to provide a simplified manufacturing and installation scheme for a fluid cooled cable system.Type: ApplicationFiled: April 21, 2006Publication date: September 9, 2010Applicant: NKT CABLES ULTERA A/SInventors: Dag Willén, Chresten Traeholt, Manfred Däumling, Jerry C. Tolbert, Mark Roden, David Lindsay
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Publication number: 20100184604Abstract: The invention relates to a superconducting element joint comprising a joint between two superconducting elements comprising at least one direct SC-SC transition joint. By the invention an improved superconducting element joint may be obtained. The invention also relates to a process for providing such superconducting element joint and a superconducting cable system comprising such superconducting element joint.Type: ApplicationFiled: June 23, 2008Publication date: July 22, 2010Applicant: NKT CABLES ULTERA A/SInventors: Mark Roden, Jerry C. Tolbert, Carsten Thidemann Nielsen, Chresten Traeholt, Paul W. Fisher, David Lindsay, Dag Willen
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Publication number: 20100179064Abstract: The invention relates to power cable comprising, at least one HTS-tape and a cooling system comprising a fluid cooling medium for cooling the at least one HTS-tape. The at least one HTS-tape being at least partly surrounded by a cooling layer comprising said fluid cooling medium and an electrical insulation at least partly impregnated with said fluid medium. The power cable of the invention has shown to reduce the risk of fault current and electrically breakdown. When extra cooling is needed for stable operation the cooling medium may evaporate in the cooling layer for providing the cooling.Type: ApplicationFiled: June 4, 2008Publication date: July 15, 2010Applicant: NKT CABLES ULTERA A/SInventors: Dag Willen, Chresten Traeholt, Carsten Thidemann Nielsen
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Patent number: 7735212Abstract: A superconducting cable comprises N phases. Each phase comprises a number of superconducting phase conductors classified into N-phase groups. Each N-phase group comprises a phase conductor from each of the N different phases, where N is greater than one, and the number of N-phase groups is larger than or equal to two. Insulation is arranged in the cable around each phase conductor or between assemblies of phase conductors, so that said N-phase groups are insulated from each other. One or more of the N-phase groups or assemblies of N-phase groups is provided with a common electrically conductive screen. The N-phase groups are arranged in a number of coaxial groups comprising at least two coaxial layers and having a common axis oriented along the length of the cable. The superconducting cable has fewer cooling channels for refrigerant than phase conductors.Type: GrantFiled: February 2, 2004Date of Patent: June 15, 2010Assignee: NKT Cables Ultera A/SInventor: Dag Willén
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Publication number: 20100126748Abstract: This invention relates to a termination unit comprising an end-section of a cable. The end section of the cable defines a central longitudinal axis and comprising end-parts of N electrical phases, an end-part of a neutral conductor and a surrounding thermally insulation envelope adapted to comprising a cooling fluid.Type: ApplicationFiled: March 19, 2008Publication date: May 27, 2010Applicant: NKT CABLES ULTERA A/SInventors: Chresten Traeholt, Dag Willen, Mark Roden, Jerry C. Tolbert, David Lindsay, Paul W. Fisher, Carsten Thidemann Nielsen
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Patent number: 6684486Abstract: By a method for constructing a superconducting multiphase cable comprising N phases, the phases are divided into n groups with N phases in each group, all the groups have a common screen. The individual groups may be geomtrically formed with coaxial or flat phases. The individual phases in each group may further be divided into individual conductors such as tapes. The insulation between the individual conductors in the groups may be separately insulated from each other or have a common insulation. In a particularly appropriate embodiment, the number of groups is 1 and implemented with a flat or concentric geometry. In this way, a compact superconducting power cable is provided, which is relatively inexpensive in production and has few working operations while maintaining good electrical properties.Type: GrantFiled: September 19, 2000Date of Patent: February 3, 2004Assignee: NKT Research Center A/SInventor: Dag Willén